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Mercury, Cadmium and Lead Levels in Three Commercially Important Marine Fish Species of in Sri Lanka

Authors:

BKKK Jinadasa ,

National Aquatic Resources Research & Development Agency, LK
About BKKK
Institute of Post Harvest Technology
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LRS Rameesha,

Sabaragamuwa University of Sri Lanka, LK
About LRS
Department of Food Science and Technology, Faculty of Applied Sciences
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EMRKB Edirisinghe,

National Aquatic Resources Research & Development Agency, LK
About EMRKB
Institute of Post Harvest Technology
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RMUSK Rathnayake

Sabaragamuwa University of Sri Lanka, LK
About RMUSK
Department of Food Science and Technology, Faculty of Applied Sciences
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Abstract

Most heavy metals which bio-accumulate in fishes, especially predatory species do not have any biological significance or beneficial use, but due to the presence of heavy metal fish can pose a health risk to consumers. The objective of this research is to determine mercury (Hg), cadmium (Cd), and lead (Pb) levels in samples of yellowfin tuna, Thunnus albacores (n=25), swordfish, Xiphias gladius (n=35), and red snapper, Lutjanus sp (n=12). Samples were prepared by dividing edible parts into small pieces and homogenizing. Total Hg was measured by cold vapor atomic absorption spectrometry whereas the Pb and Cd were analysed by graphite furnace atomic absorption spectrometry after microwave-assisted digestion. Swordfish contains highest mercury and cadmium concentrations while yellowfin tuna contained the highest lead concentrations. The mean concentrations of heavy metals in fish muscles were found to be 1.24± 0.72 mg/kg (Hg), 0.13±0.83 mg/kg (Cd) and 0.03±0.04 mg/kg (Pb) in swordfish and 0.39± 0.19 mg/kg (Hg), 0.02±0.02 mg/kg (Cd) and 0.06±0.06 mg/kg (Pb) in yellowfin tuna. In red snapper concentrations were 0.17± 0.06 mg/kg (Hg), 0.02±0.01 mg/kg (Cd) and 0.04±0.05 mg/kg (Pb).

DOI: http://dx.doi.org/10.4038/sljas.v15i0.5481

Sri Lanka J. Aquat. Sci. 15 (2010): p.39-43

Keywords: Marine fish Heavy metals 
How to Cite: Jinadasa, B. et al., (2013). Mercury, Cadmium and Lead Levels in Three Commercially Important Marine Fish Species of in Sri Lanka. Sri Lanka Journal of Aquatic Sciences. 15, pp.39–43. DOI: http://doi.org/10.4038/sljas.v15i0.5481
Published on 06 May 2013.
Peer Reviewed

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